Abstract

Low-cycle fatigue experiments have been carried out at elevated and sub-zero temperatures. Corresponding effect on cyclic plasticity characterizing parameters such as cyclic hardening/softening and Masing behavior is compared for different loading conditions. Disparities in the fatigue life as well as the cyclic plastic behavior have been attributed to the phase transformations that largely obstruct the dislocation motion. Further, the changes in strains in the materials matrix have been quantified through misorientation studies, wherein clear demarcation in strain distributions due to fatigue loading at different temperatures was obtained and further correlated with the substructural alterations observed through transmission electron microscopy.

中文翻译：

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奥氏体不锈钢温度对循环塑性变形行为的影响及其与亚结构的关系

摘要

在高温和零度以下温度下进行了低周疲劳实验。比较了不同载荷条件下对循环可塑性表征参数的相应影响，例如循环硬化/软化和Masing行为。疲劳寿命的差异以及循环塑性行为已归因于很大程度上阻碍位错运动的相变。此外，已经通过取向错误研究定量了材料基质中应变的变化，其中获得了由于在不同温度下的疲劳载荷而导致的应变分布的清晰分界，并且进一步与通过透射电子显微镜观察到的亚结构变化相关。